Very bad service

I canceled and disconnected my fiber last year because the contract ended. it’s March and they still debiting my account. They telling me i needed to get a SR number when i did the cancellation. I don’t know what a SR number is and when i called to cancel the agent didn’t tell me about this number. This is the first time i’m hearing about it. I want vodacom to check the date i stopped using their wifi : fibre and refund me all those months they been debiting my account. How can they debit me when their wifi device is disconnected and not in use? I have no idea why i still have contracts with them because they were never good to me. even with my first contract that i ported to MTN their service was bad. I’m definitely going to port to MTN with the two contracts i have with them now if they don’t pay me back. MYN has always been the best even the vodacom agents are rude and impatient. I spoke to a Jessica this morning to query my account she was over talking me and didn’t even care that i was going to report her because of her manners. I hope that call was recorded but then again it’s vodacom anything is possible, maybe the call was not recorded and i might not even get any response from this complaint im making. If they don’t assist im taking it further